Bailer



Aug. 22, 1939. T. HAMILTON EM R m T J A T BAILER Filed Nov. 8, 1937 vV// /////V/////////////// Patented Aug. 22, 1939- UNITED .STATE v BAILER Thomas J. Hamilton, Oklahoma City, Okla., assignor to Phillips Petroleum Company, a corporaton of Delaware Application November 8, 1937, Serial No. 73,46s

' or other particles from oil wells.'

have been provided wherein the interior chamber of the bailer was kept under a vacuum, which chamber upon the landing of the bailer on the bottom of the well hole was 1 opened to cause an inflow into the chamber of the well liquid having in suspension sand and silt. such bailers, while having certain advantages, are disadvantageous in that no provision is made for washing away the particles and debris which are clogging the sand particles around the well hole. With the above mentioned type of bailer, as well as in the conventional type of bailer, the bailer lands in the debris in the bottom of the well without having cleaned the well hole above the bottom of the well. The debris that is caused to enter the barrel of the bailer is only that debris which is ahead of or beneath the bailer. The debris which is opposite the sides of the bailer remains in close contact therewith and 5 should there be any material settling or caving such types of bailers 'may well.

An object of the present invention is to provide an improved bailer and oil sand Washer wherein the bailer carries with it a supply of fluid under high pressure which fluid is released on the landing of the bailer on the bottom of the well and causes a washing and agitation of the sand particles forming the wall of the well. By releasing fluid pressure in the well, the discharged; fluid will enla'ge the cavity in the debris which is penetrated and formed by the bailer so that there is less danger of the bailer sticking or becoming frozen in the well.

A further object of this invention is to provide an improved bailer which will loosen tightly packed cavings, sand, silt, wax and other residues collected in the bottom of the well or accumulated along the sides of the well or on the sand faces. A still further object of the invention is to provide an improved bailer which has a simple and efficient means for dumping or removing the material from the bailer when removed from the well hole.

A still further object of the invention is to provide an improved bailer which has a simple and Heretof ore bailers efiective means for releasing the pressure fluid v from the chamber when bottom of the well hole. A still further object the bailer strikes the of the invention is to probecome stuck in 'the vide an improved bailer jarring -acti s- PATENT( OFFICE which con siderable on can be effected within the bailer to jar the bailer loose in the hole if it should become stuck therein.

A still further object of the invention is to provide an improved bailer in which pressure fluid is discharged in a chamber bailer and directly into well hole.`

With the foregoing and o which will be made manifest near the top of the e side walls of the ther objects in view in the following detailed description and specifically pointed out in the appended claims, reference is made to the accompanyng drawing for an illustrative embodiment of the invention, wher ein:

The drawing is a vertical sectional view through Referring to the accompanying showing the same in'a.

well hole d has been released.

drawing wherein similar reference characters designate similar` parts throughout, the improved bailer is shown as comprising a two tion or gas chamber I and collecting chamber 2, with the two sections part structure, an inner secouter section or being concentrically arranged and the inner section tion. The outer secti spacedfrom the inner side walls of the outer' secon is closed at the bottom thereof by a sleeve member 3 which has a fiapper valve 4` mounted on the top member 3 is connected either screw threads or thereof. The sleeve to the outer section by lugs 'and is removable from the outer section 3 to dump the contents of the bailer after it has been pulled to from the bottom of the well.

the surface The top of the outer section is internally screw threaded at 5 to receive the sleeve member 6 which is both internally and externally threaded on its lower end at 1 and external threads screw 8 respectively. The

into the threads 5' on the upper end of the outer section while the internal threads 8 on the sleeve 6 .receive the* screw threaded upper end 9 l and thus holds the in the outer section.

inner section in The upper end of the sleeve of the inner section place withmember 6 is externally screw threaded at n to receive the cap or. head piece nally screw threaded at !2 upper end of the sleeve 6-. has an opening !3 in the ll which is interand screws on the The cap member ll top thereof in which is slidably mounted a weighted rod l4. The rod M has an eye 16 on On the lower end of the rod which prevents the rod from the top thereof in which is -attached the sand line or cable I lowering the bailer from or 1 for raising and into the well hole. !4 is a head portion being pulled through the opening 53 in the cap portion. The head portion 15 is confined within a chamber |8 in the top of the outer section.

The gas chamber or inner section of the bailer is constructed'pressure tight and made in three sections !9, 23 and 2. The lower section !9 is closed on the bottom and has a pressure fill valve extending thereinto from the exterior of the outer section. connected by screw threads to the upper end of the lower section 69 is the section 20 which has a valve seat 23 in the upper portion thereof. The upper section 2! is screw threaded to the middle section and has a valve seat 24 in'the upper portion thereof. A double acting valve having a stem 25 with heads 26 and 21 on either end thereof and a spring 28 is mounted so that one end of the spring rests on the valve seat 23 while the other end is seated on a shoulder on the valve 26. The coil spring 28 keeps the valve head 27 seated on the seat 23 thus making a pressure tight chamber 30 in the lower end of the inner section. The rod !4 and head !5 are adapted to fall by the weight of gravity, striking the upper valve head 2B and forcing the same downwardly against the tension of the spring 28 which seats the valve head 26 on the seat 24. When this occurs the valve head 27 is lowered, out of contact with the seat 23 and communication is established between the pressure chamber 30 and the chamber 29 in the upper portion of the inner section, 'Jet members 3l connect into the wall of the section 2fl and discharge the pressure gas through ports 32 in the outer section into the formation.

To operate the bailer it is necessary to fasten the sand line or cable H to the eye !6 for lowering the same into the well. But first the chamber 30 must be filled With high pressure gas' which is accomplished by a man standing on the derspace 33 between the gas chamber 30 and the outer section 2 of the bailer body and in the lower part of the bailer above the flapper valve 4. The pressure in the bailer thus being lower than the well hole pressure, the sand .and silt particles will rush through the bottom unseating the flapper valve 4, in the pressure outside of the bailer and that within the evacuated low pressure area inside the bailer.

from the gas chamber, the

When the gas has been completely discharged chamber will be filled with sand and silt and the bailer will be ready to be raised to the surface of the ground. The

weight of the sand and silt in the body of the I 23 and thus keep the sand and silt from entering the gas chamber 30. The bailer may be emptied upon reaching the surface of the ground by removing the bailer bottom 3 which is attached to the bailer body by lugs or a threaded joint.

It is to be understood that the form of my invention, herewith shown and described, is to be taken as a preferred example of the same, and that various changes in shape, size, and arrangem'ent of parts may be resorted to, without deinvention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A bailer comprising an outer tubular section, an inner tu ular section mounted in the outer tubular section, said inner tubular member for releasing the pressure fluid upon the landing of the bailer on the bottom of the well hole and discharge means for the pressure gas comprising a jet member mounted in the wall of the inner section and discharging through ports in the wall of the outer section.

3. A bailer comprising an outer tubular section, an inner tubular section mounted in the outer tubular section, a space between the two and outer sections and then through ports in the wall of the'outer section.

4. A bailer comprising an outer tubular section, an inner tubular section mounted in the outer tubular section, aid inner tubular member being closed at bothends to form a. gas tight chamber for holding fluid under pressure, said chamber being closed at the top by a sliding valve member, means for releasing the pressure fluid THos. J. HAMI'LTON. 

